Decoration of voids with rhenium and osmium transmutation products in neutron irradiated single crystal tungsten

被引：48

作者：

Lloyd, Matthew J. ^{[1
,2
]}

Abernethy, Robert G. ^{[1
,2
]}

Gilbert, Mark R. ^{[2
]}

Griffiths, Ian ^{[1
]}

Bagot, Paul A. J. ^{[1
]}

Duc Nguyen-Manh ^{[2
]}

Moody, Michael P. ^{[1
]}

Armstrong, David E. J. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[2] Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England

来源：

SCRIPTA MATERIALIA | 2019年 / 173卷

基金：

英国工程与自然科学研究理事会;

关键词：

High Angle Annular Dark Field (HAADF); Atom Probe Tomography (APT); Tungsten rhenium osmium alloys; ATOM-PROBE TOMOGRAPHY; W-RE; TEMPERATURE; ALLOYS;

D O I：

10.1016/j.scriptamat.2019.07.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High temperature, neutron irradiated single crystal tungsten, with a post irradiation composition of W - 1.20 +/- 0.11 at.%Re - 0.11 +/- 0.05 at%Os - 0.03 +/- 0.01 at%Ta was characterised using a combination of Atom Probe Tomography (APT) and Scanning Transmission Electron Microscopy (STEM). APT showed that within nanoscale clusters of Re/Os, the atomic density was above the theoretical limit Complimentary High Angle Annular Dark Field (HAADF) imaging shows that some clusters contain voids at their centre which are leading to APT aberrations and enhancing the atomic density. High resolution Energy Dispersive X-ray (EDX) spectroscopy shows that voids are decorated with a shell of rhenium with a small osmium cluster to one side. (C) 2019 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

引用

页码：96 / 100

页数：5

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